Steam trap



c. H. ATKINS.

STEAM TRAP. APPLICATION FILED MAY I3, I920.

Patented J illy ll f in section, ot theinternal mechanism. Y

3o s Y fora-ted annular-member, and

CHARLES ATKINS, @F ALMER, EEASSACEUSETTS.

STEAV- TRAP.

' appiicauon siedi/ray is.

T 0 all 207mm t may concern.:

Be it known that l, @Hamme H. ArniNs, a Ycitizen of the United States ot ieimerica, residingat tJalmer, in the county oil-lampden Aand Commonwealth of vldas'sachusetts.y have invented certain newv and useful lmprovements in Steam riraps, ot which the tollowing is a specification.

simple in construction; one that can be easily repaired and one thatfwill maintainthe valve member in accurate alignment with the ing in the valve seat. Other objects i"and nature of` this invention Vwill be more fully set forth in the body of the following' specifications land drawings, in'which- Y Fig. l1 is an elevation, `partially lin section, of the casing' of a steam trapand showw 'ing my inventiontherein.

Fig. 2 's an enlarged detailed view partly Fig. 3 is a top plan view oit the rigid per- .'Fig. 11 is a detail ot the valve aligning' device.

Referring to the drcwings in detail: the top member ot the casing;` is'indicated at l 1, and 12 indicates the bottom member Vet the steam trap casing` both of which may be of Vcast iron. A These' members are secured tol gether as shown, by bolts andthe joint between the same is made steam tight with. a

gasket. he member' 12 Ais provided `with heat radiating ribs or tins 1312er conducting` or dissipating the heat away trom the same. rllhe steam inlet, pipe which is in communication with the high pressure 'supply ot steam is connected. to the boss 14 and the outlet pipe for the water of condensation is connected to the boss he bosses'll andl-; it will be noticed, are inalignment with each other. The opening inthe valve seat 16 is closed, by means of the valve member 17 as shown in Fig; 1; normally, however, this valve when the 'trap is cold stands slightlyV Specicaton of Letters Patent.

, groove 2'?.

Patented July 11, 1922.

i920. sei-iai No. 381,106.

open to permit the flow of steam from 14 to duringr` the short interval oli' time that the yinterior ot the casing` is not warm enough to y ca use the operation of the dial'ihragm and the attached valveil. rllhe thermostatic diaphragm 18, which supports the valve member 17 is secured to the rigid supporting pla-te 19. This plate is formed with a raised *annular part, as shown. lt will be observed from Figs. 2 and 3, that a series ot openings or steam passages 7) and c provided in plate 19, these are, in turn, covered by a fine mesh wire gauze screen Q1 as shown on the lett halt ot'Fig'. 3 and which is secured in :place at its outer` edge by means of the ring 29 being' located in the groove 2G and at its inner edge by means Vof the ring 24 in the The plate 19 is formed with undercut- `grooves-as shown in section iii-Fig. 2, and the ring'QQl is split or cut at 23 and the ring 24 is Ysplit or cut at Q5, so thatthey may be sprung` or snapped into placetor securingy the wire gauze taut over the openings t:

gauze is used as a lilter vand rllhe Ywire 'tor the steam and this clamping arrangement enables it to be quickly replaced.

luto the rigid supporting` plate 19 is screwecil tl e hollow stem 31 which is locked in position by means ot thernut 32. This stem supports-the thermostatic donble walled expansible diaphragm 1S which is partially vfilled with a volatile liquidd. A portion of lthe lower end ot the stem S. is burred around the upper plate ot the diaphragm, as

:shown at 3.7; Fig. aand vthe lower plate 36 `ot'jthe Vdiaphragm is burred around the stem Sigi as shown at 3S. he valve member l1? is screwed to the stem 33 and moves therewith Freni this construction ot the diaphragm it will be noticed that the two opposite or double walled members and 3G can move independently of each other so as to produce great'sensitiveness, thus', while the side 85 is rigidly secured'to the plate 19 which is clamged' in position by the cover 11 o t the trap. valve member 1T is tree to move with side ESQ-1n order to insure perfect alignment with theopenina in the valve seat the, ujriwardly extending; part ot the plunger is guided by means oft the opening` in stem ,31. LTheV valve member 17 can thus move only'in a direct line with the valve seat and and secured to the rigid member, a. valve multaneously With the interior of the casing secured to the diaphragm, the rigid member to open the valve and will immediately eX- being located under the inlet port and havpand to close the valve by the incoming ing openings to permit the incoming Steam steam, passing through the openings in the to directly surround the diaphragm to cause rigid member and directly into Contact With the expansion of the liquid in the diaphragm the diaphragm.

to Close the valve, the construction being such that the diaphragm will be Cooled si- CHARLES H. ATKINS. 

